/*
 * Copyright (c) 2017, 2018 Oracle and/or its affiliates. All rights reserved.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package io.helidon.common.reactive.valve;

import java.util.Iterator;

/**
 * The {@link Valve} implementation for {@link Iterator}.
 */
class IteratorValve<T> extends RetryingPausableRegistry<T> implements Valve<T> {

    private final Iterator<? extends T> iterator;

    IteratorValve(Iterator<? extends T> iterator) {
        this.iterator = iterator;
    }

    @Override
    protected T moreData() {
        return iterator.hasNext() ? iterator.next() : null;
    }
}
